Double burner grills offer more versatility and cooking space compared to single burner grills. With two burners, you can create different heat zones, allowing for simultaneous cooking of various foods at different temperatures. This is ideal for grilling items that require distinct cooking methods, such as searing meat on high heat while cooking vegetables on a lower setting. 
Double burner grills generally provide a larger cooking surface, accommodating more food at once, which is beneficial for entertaining or cooking for larger groups. They often come with additional features like side shelves, warming racks, and storage space, enhancing convenience and functionality.
In contrast, single burner grills are typically more compact and portable, making them suitable for small spaces, camping, or tailgating. They are easier to transport and store, and usually more affordable, appealing to those with budget constraints or limited space. However, the single burner limits the ability to create multiple heat zones, which can restrict cooking flexibility.
Overall, the choice between a double burner and a single burner grill depends on your specific needs, such as cooking volume, space availability, and desired features. Double burner grills are better suited for those who need more cooking space and versatility, while single burner grills are ideal for those prioritizing portability and simplicity.